Coal hopper for handpiece of belt machine
A machine head and belt technology, which is applied to the field of belt head hoppers, can solve the problems of easy deformation and damage of the bottom plate of the hopper, shortening the service life of the hopper, and the slope of the inclined plate is too slow, so as to achieve easy disassembly and assembly, The effect of reducing the difficulty of transportation and quick installation
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[0023] The preparation method of the wear-resistant steel layer comprises the following steps:
[0024] 1) Weigh the raw materials according to the weight percentage of each component, carry out smelting and preliminary adjustment of components to obtain molten iron, refining desulfurization, deoxidation, fine-tuning the components, pouring, after casting and molding, cleaning to obtain castings;
[0025] 2) Preheat the casting obtained in S1 at 1250°C for 50 minutes, then quickly inject nitrogen gas, heat for 30 minutes, keep warm for 5 hours, and then perform pre-cooling treatment in clean water. The time of pre-cooling treatment is 2 minutes, and the temperature of clean water is 35 ℃;
[0026] 3) Place the castings after precooling in S2 in NaNO2 brine solution for quenching treatment, the quenching temperature is 880°C, and the quenching time is 8 minutes, and the quenched castings are heated to 500°C for tempering treatment, and then tempered. The fire time is 7 hours, ...
experiment example
[0028] Select 30 pieces of wear-resistant steel layers with the same conditions, and each group of 10 pieces is divided into three groups: A, B, and C. The wear-resistant steel layers of group A are ordinary wear-resistant steel layers, and the wear-resistant steel layers of group B are imported wear-resistant steel layers. The group is the wear-resistant steel of the present invention.
[0029] And according to the mechanical properties, wear resistance and corrosion resistance as the basis for comparison, the situation of the three groups of wear-resistant steel layers is analyzed, and the best wear-resistant steel layer is obtained.
[0030] The specific data are shown in the table below:
[0031]
[0032] Comparing the three groups of materials, the wear-resistant steel layer of the present invention has the best mechanical properties, wear resistance and corrosion resistance.
[0033] Working principle: When in use, first use bolts 11 to connect the bottom ends of the...
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